S&P 500 Sees AI Bubble Deflate as Index Regresses Toward Its Mean Trend

Two months ago, the S&P 500 (Index: SPX ) was rising so quickly it raised the prospect the index could see a break down in the relative period of order the index established since the end of 2023. Instead, after peaking on 2 June 2026, the S&P 500 has reverted toward its established mean trajectory. Through the end of July 2026, the index is hovering right around that 31-month-old central trend…